Key-seating machine



(No Model.)

Patented Jan'. 16, 17894l Sm o n u. w G. m K

-%///////V//V//L l mi Q UNITED STATES PATENT OFFICE..

GEORGE J. COSTELLO, OF PHILADELPHIA, PENNSYLVANIA.

KEY-SEATING MACHINE.

SPECIFICATION forming part -of Letters Patent No. 512,808, dated January16, 1894-..

Application tiled February l, 1893. Serial No. 460.553. (No model.)

To all whom it may concern:

Be it known that I, GEORGE J. CosrELLo,-a citizen of the United States,residingat Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inKey-Seating Machines, of which the following is a specification,reference being had therein to the accompanying drawings.

My invention relates to improvements in key seat cutters and consists incertain novel features which will be hereinafter described and claimed.

The object of my invention is to produce a portable machine by the useof which key seats may be readily cut in the bores of large pulleys andgear-wheels. This object I accomplish by the use of the deviceillustrated in the accompanying drawings, in which- Figure lis a frontelevation of my improved machine showing it in position in a wheel. Fig.2 is an end view of my improved machine in its operative position andFig. 3 is a longitudinal section of the machine. Fig. 4 is a detailperspective view of one of the wedges for holding the cross head to itsguides, and Fig. 5 is a cross section on the line :c-x of Fig. 3.

Referring to the drawings by letter, Adesignates the body of my improvedkey seat cutting machine which is substantially U- shaped incross-section and is provided on its outer surface at its center withthe longitudinal grooves B having inclined bases in which wedges C areinserted to bear against the bore of the wheel or pulley and therebysecure the machine in position as will be readily understood on'reference to Fig. l. The edges of the body are beveled as shown atl)and on its inner side the body is provided with the longitudinal ribs orguides E on which I mount a cross-head F. The rotary cutter-head G ismounted in this cross-head F so as to rotate freely therein and carriesa rotary knife or cutter II as clearly shown. The rotary knife or cutterdepends from the lower end of the cutter-head and on the upper end ofthe cutter-head I provide the beveled pinion I which meshes with asimilar pinion .I on the inner end of the driving shaft K. The saiddriving shaft is supported by a standard L rising from the crosshead anda bracketM secured to the end of the body. The driving shaft isjournaled directly in the cross-head and passes through a sleeve N inthe bracket, being keyed of the body I secure a bracket S in which aninternally threaded sleeve T is secured, the

said sleeve having a hand wheel U secured to its outer end. A worm-screwV is mounted in the said sleeve and engages the threads of the same, itsinner end being connected to the cross-head as shown, so that when thehand wheel U is rotated a longitudinal movement will be imparted to theworin-screw and the cross-head consequently shifted longitudinally ofthe main body of the machine. In order that the cross-head may hold thiscutter firmly to it's work and not'move too easily upon its ways orguides I provide the tapered keys or wedges WV which are fitted betweenthe said ways or guides and the seats therefor in the cross-head asshown most clearly in Fig. 3. These keys or wedges are provided at theirvlarger ends with the inwardly projecting offsets X in which I mount theset screws Ythe ends of which engage sockets Z in the crosshead. It willbe readily seen that by properly adjusting the set screws the cross-headwill be held upon the ways or guides with the desired steadiness.

From the foregoingfdescription, taken in connection with theaccompanying drawings, it will be seen that I have provided a verysimple machine by which 'key seats may be easily and rapidly cut in thebore of a large gear-wheel or band-pulley and the advantages thereof arethought to be obvious.

In practice, the machine is inserted through the bore of the wheel andsecured therein by means of the wedges shown and described and motion isthen imparted to the driving wheel and through the same and theintermediate IOO gearing to the driving shaft. The cutter will thus beset in motion and will be caused to act on the inner surface of thewheel so as to form a groove or key seat therein. As the metal of thewheel is cut away the hand wheel U is turned so as to move the wormshaft which thereby slides the cross-head along the body andconsequently holds the cutter to its work.

It will be readily observed that my machine is composed of veryfewpartsand that abroken or worn out part can be easily and quickly renewedwithout in any way impairing the efciency of the machine.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

l. A portable key seat cutter having a substantially U-shaped bodyprovided with beveled edges whereby it is adapted to it within `and beheld by the hub of the Wheel or pulley and having grooves on its outerside adapted to receive. and hold the securing wedges.

2. The combination of the body having brackets at its ends, thecross-head mounted therein and having a standard, a cutter earried bysaid cross-head, a driving shaft mounted in the standard on the crosshead and the bracket at one end of the body, gearing between saiddriving shaft and the cutter, an adjusting screw mounted in the bracketat the opposite end of the body and connected to the cross-head andmeans for operating Said adjusting screw.

In testimony whereof I affix my signature in the presence ot' twowitnesses.

GEORGE J. COSTELLO.

Vitnesses: i

JOHN I. FARRELL, HENRY E. ECKERSBERG.

